JPS6094635A - Spun fiber yarn like product for knittingg and weaving and method and apparatus for producing the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spun fiber yarn type product obtained by combining conventional spinning methods with pneumatic means for interlacing the textile fibers. The present invention also relates to a method and apparatus for manufacturing the stone.

French Patent Application No. 81/24469, 1981
February 28 (Publication No. 2519035) is a spun fiber yarn type product with twisted plies, where the yarn has a parallel ply structure without helices with an open zone, and the fibers are closed. The cohesion coefficient (
cohesion factor) is 100 or more, preferably 120 to 180.

Despite the high conjugation coefficient of the spun fiber yarns obtained, in some cases ply shear can be observed during subsequent processing, which for certain applications can lead to defects and even breakage, and this shear As a result, the strength of the spun yarn is reduced.

French Patent Application No. 82/16,347, September 27, 1982 (publication number part 4533.593) describes a spun fiber yarn-type product of the type, in which a supporting material for twisted fibers is There is a reed in the central or core position, and the free ends of the open zone are wound around the reed, the length of the free ends being at least equal to the average circumference of the support, and these free ends forming an envelope. We propose what to form.

This provides good compactness which makes it possible to avoid bunching between the fibers in the untwisted open zones. Despite the low conjugation coefficient 5-, fagoting (4 ng to fcL) allowed the production of yarns with improved strength and reduced elongation.

In order to obtain a spun fiber yarn type product with higher strength and a fagoted appearance (a fagoted appearance is not desired in lick type applications such as pickevil), pressure, compressed air flow rate or yarn Although it was possible to reduce the parameter of take-up speed, this was rather inconsistent with the economic concept of yarn production.

According to the present invention, we provide a spun yarn in which the fibers have a helical structure with an open zone and a closed zone, the binding coefficient of the spun yarn is less than 100, preferably between 20 and 80, and the torsion coefficient of the spun yarn is the same. To provide a spun fiber twisted yarn with intertwined plies having a twist coefficient of 25 to 40 degrees typically found in conventional spun yarns having counts.

61 The present invention also provides an operation for feeding the roving or sliver to a filament machine for filamentation and for tying the plies by pneumatic means, wherein the operation of feeding the roving or sliver to a filament machine for filamenting the ply as it is fed to the pneumatic means. The angle created between the thread and the axis of the groove when it passes through the pneumatic means is 0°
~80° and the distance between the pneumatic means and the exit of the wirer is at most a distance equal to the average length of the treated fibers, and then subjecting the yarn exiting said pneumatic means to a heating operation comprising winding the spun yarn into a tube with a rotating vertical spindle by conventional ring/cursor means, and twisting the resulting yarn. The coefficient is 2 of the twist coefficient normally used in the conventional method for the same first spun yarn.
5 to 40%.

The fluid pressure used in the twisting means is preferably between 1.5 and 4
．． 10'Pα, and the angle between the thread and the axis of the groove as it passes through the pneumatic means is preferably between 20' and 60
°.

The invention also provides a means for making rovings or slivers;
comprising a filament machine, a pneumatic combing means, a relaxing treatment zone and a spindle ring/cursor assembly for winding the resulting spun yarn;
Provides an apparatus for producing spun fiber yarn.

The spinning method depends on the speed of the vertical spindle, the lightness of the winding tube,
Limited due to limited strength of the device. It can therefore be advantageous to separate the pneumatic twisting stage from the actual heating stage in the production of spun yarns, in the latter case the method of producing spun fiber yarns being discontinuous.

Thus, the present invention also provides for feeding the fiber rovings or slivers to the filament machine, and adding 300 ffl/sliver to the filament that exits the filament machine.
The product leaving the pneumatic means is subjected to pneumatic matching means at a speed of up to 100 minutes, so that the resulting product has a conjugation coefficient of less than 100, and the product exiting the pneumatic means is placed in the form of a bobbin on a pick-up tube. A process for the discontinuous production of spun yarn, comprising the steps of raising the yarn wound on said bobbin and subsequently taking up and heating the yarn wound on said bobbin either by itself or with other similarly made yarns. I will provide a.

In fact, the pseudo-knots imparted to the knitting of the cotton fibers have a low heave resistance when the fibers are placed under tension and densify the fibers in a helical motion. It has been found that the rotation of the twist imparted in particular tends to close the entire spun fiber yarn and prevent fiber crowding, increasing the adhesion coefficient between the fibers and thus fixing the pseudo-twist. .

9- The fiber-to-fiber binding coefficient can advantageously replace the usual torsion value of 60 inches, and in certain fibers with a low coefficient of fiber-to-fibre friction lead to strength values approximately equal to those obtained with conventional spinning methods. I also found out that I can get it.

Therefore, the resulting product of the spun fiber yarn type is
It has sufficient strength for all textile applications, especially furniture applications such as picket bails. The spun yarn can be used either alone or in multiple windings (multi-blue winding) or in combination with other forms such as continuous yarns or other spun fiber yarns. The open and closed zones have good uniformity as they are hardly evident; the reduced conspicuousness of the zones results in good spreading of the tufts and good covering ability, making the pickaxe suitable for use as floor coverings. This is advantageous in fabrics using pile.

= l 〇- This method has the advantage that conventional spinning equipment can be used without subsequent processing to obtain higher production rates, thus increasing the productivity of the equipment by a factor that can range from 1 to 3. has.

For discontinuous methods, the speed of passage of the thread through the pneumatic means is high and can range up to speeds of the order of 300 m/min, and the conjugation coefficient is less than 100.

The chain thread is taken up in the form of a bobbin into a winding tube, which can be very heavy. The yarn is then wound up and heated, either alone or for any purpose, on any known means, such as stranders, double twist spindles, twisting machines, etc. An advantage afforded to this method is that it uses conventional equipment and potentially reduces the number of product processing steps.

The fluid means used are generally oven-type, i.e.
It is a single jet nozzle of the type with a slit that makes it easier to introduce threads, slivers or rovings during production. The nozzle is filled with a fluid, generally air, preferably between 1.5 and 4.
The fluid is pumped in at a pressure of 10"Pa. The temperature of the fluid is generally room temperature, but when using fibers with special properties (shrinkage, latent crimp, etc.), high temperatures can be used to obtain special effects. The distance between the pneumatic means and the wirer is at most equal to the average length of the fibers to be processed.

The crimp means is generally placed between the striation machine and a set of intermediate rolls that can adjust the tension at the nozzle, and the distance between the striation machine and the relaxing roll is 40 to 200 m.
Changes between 1 and 2 are obtained. The angle formed between the yarn exiting the filament machine and the groove axis when the yarn passes through the nozzle is θ ~ 80°
, preferably between 20 and 60 degrees, so that the air jet created in the discharge channel does not disturb the alignment of the fibers exiting the stretch gear.

BRIEF DESCRIPTION OF THE DRAWINGS From the following description, which is given solely by way of example, it will be clear how to carry out the invention, and reference will be made to the drawing, which is a schematic diagram of an embodiment of the device according to the invention.

The drawing shows a textile fiber to be spun 1, a delivery roll 2 at the exit of a conventional filament machine (not shown), a twisting nozzle 3, a feed roll 4, a big tail guide 5,
Ring/cursor vertical movement system 6 and spun fiber yarn 8
A tube 7 is shown for winding up. In operation, the textile fibers 1 to be spun are fed in the form of rovings or slivers to a drawing machine (not shown) and exit the drawing machine via delivery rolls 2. The striated textile fabric is then threaded between feed rolls 4, which are generally rotated at low speed by delivery rolls, through a big tail guide 5, and through ring-cursor means 6 for up and down movement in a conventional manner. It is twisted and wound up in the form of a spun yarn 8 onto a tube 7 which has previously passed through a rotating spindle.

The resulting product of the spun fiber yarn type is suitable for all textile applications, preferably pick pile goods, furniture, miscellaneous goods,
It can be used for internal covers for vehicle body design, etc.

The present pneumatic means can be easily integrated into any traditional spinning system for short or long fibres, for cotton, worsted yarn, single flow yarn or wool.

The following examples illustrate the present application without limiting it.

Example 1 Spun fiber yarn products of metric count 3.8 were prepared using yarns with counts 19 and 11 dtex, respectively, and 170 and 1505 decitex, respectively.
obtained by curving a 70/30% mixed fiber of polyhexamethylene adipamide fibers having a length of 14 m and then intersecting three consecutive passes.
8.5.9! Produced from meter sliver. 8.
51! / The roving of love is 5KF-PF-T.

Transfer to a SCHLUMBERGER single-flow yarn machine equipped with a 4-stripe machine. The striae ratio shown is 356 per meter. Upon exiting the filament gear, the refined rovings are processed into spun fiber yarns by conventional and inventive methods under the following conditions.

A Conventional method twist coefficient = 80 Thread/doll speed: 6.50 Orpm Twisting: 156 revolutions/meter Outlet speed of wire machine: ag, sm/min Kern No. 630 (BRAEKERT): Ring radius = 93 threads obtained has the following properties.

Metric count: 3.8 Uniformity (U%): 13, breaking load 4,290 grams, weak point 4, strong point 4 B Method according to the invention Torsion coefficient: 31 Spindle speed: 6. 500 r 7) Love twist 2 61
Rotary Rotation - Torr wire machine exit speed; 106 information/min Cursor number: 1,250 Air is delivered to the twisting nozzle at ambient temperature and 3.10'Pα pressure, and the nozzle is 106 min from the delivery roll.
In the basket position, the roving enters along the axis of the nozzle and forms a 45° angle with the vertical plane passing through the axis of the delivery roll. The distance between the nozzle and the relaxing treatment roll is 100m.
, the relaxation between the nozzle exit and the intermediate roll is 2
It is Chi.

The resulting yarn has the following properties:

Metric count: 3.8 U = 14.5 Coupling coefficient = 55 Breaking load: 3520 grams Weakness 120, Strength 20, Defect (imperfection)
15 The resulting yarn has better properties compared to spun yarn of the same metric count obtained by conventional methods.

Furthermore, chain threads are produced approximately three times faster than conventional thread weaving methods, which is advantageous from the point of view of the economics of implementing the method.

Example 2 FC with counts of 19 dtex and 11 dtex
, 19 decitex 70chi and 150 cut to 170mm
The polyhexamethylene adipamide fibers cut into 5 m pieces and mixed in a ratio of 11 dx30 s were HGed in the traditional manner by intersecting the carding and bathing 3 times.
/SCR/, II M I
IE/? NSCCF3 for single flow yarn made by GER
Send to 3 machines.

The spindle speed of the machine was set to 65007 pm and the applied twist factor was 31, which represents a twist of 61 revolutions/meter for the desired metric count of 3.8.

In the first experiment, a single jet type nozzle was used in Example 1.
However, compressed air is not sent to the nozzle.

The spun yarn obtained by winding with a twist of 61 revolutions per meter has a breaking strength of less than 10 (10). Furthermore, due to breakage at the cursor, mechanical operation under these conditions is difficult. would be impossible.

In the next experiment, it is fed into a single jet nozzle under a pressure of 3.105 Pa. The relaxation between the 2-minet processing stage and the intermediate rolls is 2t relative to the feed stage to ensure correct alignment of the fibers in the alignment nozzle.
It is adjusted to 16.

The twist remains the same. The resulting spun yarn has a strength of 29899.

Example 3 Under the conditions given in Example 1, spun fiber yarns were prepared by the conventional method (experiment D) and by the method of the invention by varying the pressure delivered to the pneumatic means (experiment A). , B and C) manufacture.

The conditions and results are as follows.

-10- Experiment A Pressure, 105Pα 3.5 Meter count 3.8 Twist coefficient 31 Rotation/extension 61 Spindle speed, rp'+7' 6,500 Spun yarn speed m/m t n 106U% 14.5 Strength 1. f 3,580 Coefficient of variation of intensity 13 Weakness 150 Focus 20 Defect 15 Conjugation coefficient 55 /17 CJJ) 3 25 0 3,8' 3.8 3.8 31 31 31 61 61 61 6,500 6.500 6.500 106 106 38.5 14.9 15.1 15.9 2.989 2,181 4,280 17.8 44.9 11 425 532 12 50 44 4 30 144 4 42 20 0 20- These results are The yarn obtained by the method of the invention has properties similar to those obtained by the conventional method, as in Experiment A, or properties suitable for use with certain glazes, as in Experiments 1 and C, but the production speed is always lower. Almost three times higher.

Example 4 An acrylic fiber sliver made from a blend of 50% set fibers and 50 inches of shrinkable fibers with a count of 5 decitex/ply is made from a dyed tow. The weight of the sliver produced by traditional methods is 'l1lll.

Spun fibers of metric count 5 are produced under the conditions specified in Example 3 on a semi-worsted yarn machine of the CF33NSC type. The indicated stretch ratio is 35.6, the relaxation between the exit of the wire machine and the intermediate roll is 1.5 inch, and the nozzle is 2.
the same distance from the two rolls, i.e. 100 m from each
located at a distance of

Air is delivered to the jet nozzle at a pressure of 1.10' Pa to 3.10' Pa - part with a jet diameter of 2 mm and a thread passage diameter of 3 mm. Spindle speed is adjusted to 6500 rpm. The comparison results are as follows.

Toro Senroto ψ Lo So 23- The resulting yarn has similar properties to traditional spun yarn, and
Produced twice as fast.

Example 5 A spun fiber yarn with a metric count of 20/1 is produced continuously according to the invention in the following manner.

3,3 obtained by machining a tow with a length of 3.5 inches
Semi-matte polyester fibers with a count of 3.3 dc obtained by processing 60 tm of semi-mat polyester fibers with a count of 3.3 dc and a tow 3.5 inches long.
A roving with a metric count of 1 or 2, consisting of mixed fibers with 40 parts of component polyester fibers, is treated. The manufacturing conditions and the results obtained are shown below.

Experiment I Experiment J According to the invention Conventional method Stretching type pK628 Same = 24 - Stretch ratio 166 Same stretch zone length 11 degrees 220 Same spindle speed, rpm B, 600 B, 600 Torsion coefficient 36 85 revolutions/meter 161 380 Ring diameter, w 55 55 Force-Sol number 19 19 Rigids, chain 3 - Yarn production speed, m7 min 53 22.6 Nozzle pressure, 10'Pα 1 - Metric count 19.9/1 20.5/1 Elongation ,blood
23.2 27.6 Strength, #750 1,004 Breaking length 14.9 20.18 Coefficient of variation 14 9.96 U-related 13 11.2 Weakness 64 36 Strength 28 12 Defect 48 20 To the continuous method of the present invention The resulting spun yarn has similar properties to the spun yarn obtained by conventional methods without pneumatic means and is produced at twice the speed.

[Brief explanation of drawings]

The figure is a schematic diagram of one embodiment of a device according to the invention. 1... Textile fiber, 2... Delivery roll, 3...
Twisting nozzle, 4...Feed roll, 5...
Big tail guide, 6... Ring/cursor vertical movement system, 7... Winding tube, 8... Spun fiber yarn

Claims (1)

[Claims] 1. A heated spun fiber yarn with a twisted brie, in which the fibers have a helical structure with open goons and closed zones, and the conjugation coefficient of the spun yarn is 100, preferably between 20 and 80, and the torsion coefficient of the spun yarn is between 25 and 41 of the torsion coefficient normally found in the same number of conventional spun yarns. 2. In the method of producing spun yarn, the roving or sliver is sent to a filament machine to filament, and then the sliver is filaed by pneumatic means.
The operation of twisting the ply, in which the angle created between the yarn as it is fed into the pneumatic means and the axis of the groove as the yarn passes through the pneumatic means is between 00 and 80° and Outline of matic means and liner machine]
] is at most a distance equal to the average length of the processed fibers, the filament exiting the filament machine is subjected to at least one stroke, and then by conventional ring/cursor means.
The method comprises winding the spun yarn in a tube with a rotating vertical spindle, subjecting the exiting yarn to the pneumatic means, which is a heating operation, so that the torsion coefficient of the resulting yarn is the same as the first spun yarn. The torsion coefficient is 25 to 40% of that normally used in conventional methods. 3. The pressure of pneumatic means is 1.5~4.10"
The method according to claim 2, wherein Pα. 4. The angle between the thread when it is fed into the pneumatic means and the groove when the thread passes through the pneumatic means is 20
The method according to claim 2 or 3, wherein the angle is between ' and 60[deg.]. 5. The method according to any of claims 2 to 4, wherein the spun yarn is subjected to a relaxing treatment step when it is produced. 6. A method for discontinuously producing spun yarn, in which the fiber roving or sliver is fed to a filament machine, and the filament that comes out of the filament machine is
The product leaving the pneumatic means is subjected to pneumatic binding means at a speed of up to 1 minute so that the product thereby obtained has a conjugation coefficient of less than 100, and the product leaving the pneumatic means is placed in the form of a bobbin on a pickup tube. A method comprising the steps of raising the yarn, followed by taking up and heating the yarn wound on the bobbin, either by itself or with other similarly formed yarns. 7. Spun fiber yarn production equipment, comprising means for producing roving or sliver, a filament machine, pneumatic twisting means, a relaxing treatment zone, and a spindle ring/cursor for winding the obtained spun yarn. A device consisting of an assembly.